如何从scrapy响应中获取cookie并将cookie设置为下一个请求？

Question

I have disabled the Default Scrapy cookie option, so that i have to set it manually.

COOKIES_ENABLED = False
COOKIES_DEBUG = True

Now, i need to set cookie with the value which is received as the response of the same site. I can able to get the cookie as below,

cookie = response.headers.getlist('Set-Cookie')[0].split(";")[0].split("=")

now i am trying to set it to the form request by

FormRequest.from_response(response,
                formdata={"username": "asldkfs", "pass": "slskd"},
                cookies={cookie[0]:cookie[1]},
                meta = {'dont_redirect': True,'handle_httpstatus_list': [302]},
                callback=self.redirection)

def redirection(self,response): 
    self.log("redirection")
    self.log(response.headers)               
    self.log("Cookie2")
    cook1 = response.headers.getlist('Set-Cookie')[0].split(";")[0].split("=")
    self.log(cook1)        
    self.log("end cookie2")
    return Request("http://something.net/some/sa/"+response.headers.getlist('Location')[0],cookies={cook1[0]:cook1[1]},
        callback=self.check_login_response)

.
.
.

So I could not set the cookie.Do i need to set any other value also or what could be the problem?

Answer 1

The cookies argument only works if you have COOKIES_ENABLED set to True, since CookiesMiddleware handles it.

Hence you have to set it manually on the headers:

cookie = response.headers.getlist('Set-Cookie')[0].split(';')[0]

FormRequest.from_response(response,
            formdata={"username": "asldkfs", "pass": "slskd"},
            headers={'Cookie': cookie}, # <---
            meta = {'dont_redirect': True,'handle_httpstatus_list': [302]},
            callback=self.redirection)

Answer 2

我认为如果您禁用它，您将无法使用 cookie。

Answer 3

Paulo Romeira的回答是正确的，只是缺少从字节到字符串的解析：

cookie = response.headers.getlist('Set-Cookie')[0].decode("utf-8").split(";")[0].split("=")

Answer 4

You can also use the concepts of creating cookiejars and handling the cookies there (for maintaining sessions in scrapy) using the following strategies documented here in the official scrapy docs: https://doc.scrapy.org/en/latest/topics/downloader-middleware.html#std:reqmeta-cookiejar

Also refer this stackoverflow issue: Scrapy - how to manage cookies/sessions